/// <summary>
/// Sets the fields of the object from a native JET_COLUMNDEF struct.
/// </summary>
/// <param name="value">
/// The native columndef to set the values from.
/// </param>
internal void SetFromNativeColumndef(NATIVE_COLUMNDEF value)
{
this.coltyp = (JET_coltyp)value.coltyp;
this.cp = (JET_CP)value.cp;
this.cbMax = checked ((int)value.cbMax);
this.grbit = (ColumndefGrbit)value.grbit;
this.columnid = new JET_COLUMNID {
Value = value.columnid
};
}
/// <summary>
/// Returns the unmanaged columndef that represents this managed class.
/// </summary>
/// <returns>A native (interop) version of the JET_COLUMNDEF.</returns>
internal NATIVE_COLUMNDEF GetNativeColumndef()
{
var columndef = new NATIVE_COLUMNDEF();
columndef.cbStruct = checked ((uint)Marshal.SizeOf(columndef));
columndef.cp = (ushort)this.cp;
columndef.cbMax = checked ((uint)this.cbMax);
columndef.grbit = (uint)this.grbit;
columndef.coltyp = checked ((uint)this.coltyp);
return(columndef);
}
public void ConvertColumndefFromNative()
{
var native = new NATIVE_COLUMNDEF()
{
cbMax = 1,
coltyp = (uint)JET_coltyp.LongText,
columnid = 0x100,
cp = 1200,
grbit = (uint)ColumndefGrbit.ColumnMultiValued,
};
var columndef = new JET_COLUMNDEF();
columndef.SetFromNativeColumndef(native);
Assert.AreEqual(1, columndef.cbMax);
Assert.AreEqual(JET_coltyp.LongText, columndef.coltyp);
Assert.AreEqual<uint>(0x100, columndef.columnid.Value);
Assert.AreEqual(JET_CP.Unicode, columndef.cp);
Assert.AreEqual(ColumndefGrbit.ColumnMultiValued, columndef.grbit);
}
/// <summary>
/// Returns the unmanaged columndef that represents this managed class.
/// </summary>
/// <returns>A native (interop) version of the JET_COLUMNDEF.</returns>
internal NATIVE_COLUMNDEF GetNativeColumndef()
{
var columndef = new NATIVE_COLUMNDEF();
columndef.cbStruct = checked((uint) Marshal.SizeOf(columndef));
columndef.cp = (ushort)this.cp;
columndef.cbMax = checked((uint) this.cbMax);
columndef.grbit = (uint)this.grbit;
columndef.coltyp = checked((uint) this.coltyp);
return columndef;
}
/// <summary>
/// Sets the fields of the object from a native JET_COLUMNDEF struct.
/// </summary>
/// <param name="value">
/// The native columndef to set the values from.
/// </param>
internal void SetFromNativeColumndef(NATIVE_COLUMNDEF value)
{
this.coltyp = (JET_coltyp)value.coltyp;
this.cp = (JET_CP)value.cp;
this.cbMax = checked((int) value.cbMax);
this.grbit = (ColumndefGrbit)value.grbit;
this.columnid = new JET_COLUMNID { Value = value.columnid };
}
public static extern int JetGetTableColumnInfo(IntPtr sesid, IntPtr tableid, ref uint pcolumnid, ref NATIVE_COLUMNDEF columndef, uint cbMax, uint InfoLevel);
public static extern int JetGetColumnInfo(IntPtr sesid, uint dbid, string szTableName, string szColumnName, ref NATIVE_COLUMNDEF columndef, uint cbMax, uint InfoLevel);